Update as of Feb. 6: This very popular model of Geiger counter, the Rad 100, is now back in stock, for immediate shipment.
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The recent stepchild to the Radalert 100X, and as in its parent model, the Rad 100 is designed for general purpose monitoring of radioactivity.
The Rad 100 is identical to the Radalert in most every respect. The main difference is that the Rad 100 has no user adjustable audible Alert feature, making possible substantial savings to the consumer.
Like the Radalert 100, the Rad 100 otherwise offers these main features:
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The Rad 100 is an excellent value for the money, offering good sensitivity in a user friendly Geiger counter with digital readout.
This item typically ships within 1 business day.
Specifications for the Rad 100:
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Detector |
Halogen-quenched, long thin cylindrical Geiger-Mueller tube (LND712) with side wall of .012" #446 stainless steel, and with thin mica end window |
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Window Size |
1.5 to 2.0 mg/cm² thick; |
| Radiation Detected | Alpha, Beta, Gamma, X-ray |
| Sensitivity | Detects alpha down to 2.5 MeV; efficiency at 3.6 MeV > 80% |
| Detects beta at 50 keV w/35% efficiency, at 150 keV w/75% | |
| Detects gamma and X rays down to 10 keV thru window, 40 keV minimum through case; gamma sensitivity is 1,000 CPM/mR/hr referenced to Cs-137 | |
| Normal background is approximately 10 to 20 CPM | |
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Accuracy |
± 10%typical; ±15% max. |
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Operating Ranges |
.001 to 110 mR/hr; .01 to 1,100 µSv/hr; 0 to 350,000 CPM; 0 to 3,500 CPS; Total from 1 to 9,999,000 counts; Timer: up to 40 hours |
| Anti-Saturation | "Jam" protection allows readout out to hold at full scale in high radiation fields |
| Indicators | LED display, red LED count light, audible beeper for count rate, and audible alert |
| Display | 4-digit liquid crystal display with mode indicators; updates every 3 seconds |
| Count Light | Red LED flashes with each count |
| Beeper | Chirps for each count (can be muted) |
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Calibration |
At factory to NBS standard Cesium 137 gamma source |
| Temperature Range | -10 deg. to +50 deg. C, 14 deg. to 122 deg. F |
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Power Required |
One 9-volt alkaline battery (included in price of the unit) |
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Battery Life |
2,160t 625 hours at 1 mR/hr with beeper off |
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Weight |
225 grams (8 oz.) including battery |
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Size |
150 x 80 x 30 mm (5.9 x 3.2 x 1.2 in.) |
| Output Port | Stereo 3.5 mm jack on side sends counts to computers, data loggers, other CMOS-compatible devices, and headphones |
| Input Port | Mono 2.5 mm jack provides electronic calibration input |
| Options | Computer cable and software (See Software) |
| Warranty | Two year limited on instrument, 1 year on Geiger-Mueller tube; includes CE mark |
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Country of Make |
USA |
5 Reviews Hide Reviews Show Reviews
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Great. Very handy. Easy to use and transport.
Very handy and easy to transport. Useful for many situations and settings.
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RAD 100 purchase
Item as advertised. Functions properly. Easy to use. Instructions easy to read and understand. If the case had a flat bottom instead of a curved one would be a plus.
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a real need for your protection in the coming threat of nuclear war
We are advising all of our listeners (on my Tuesday Hagmann Report appearances) and periodically on our daily news analyses website (standeyo.com) to get the RAD100 digital radiation detector. It is a hand-held, lightweight device with audio feedback of the radiation detected. According to our information from our dealings with some military departments, the US is facing a clear and present danger of both an EMP attack from China and Russia and a brief nuclear attack on the US...
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Easy to use and helpful manual
This geiger counter is very simpe to use and you can switch the units between Roentgens, Seiverts, and counts per minute. The manual that came with is is very useful and outlines best practices, along with good descriptions of how to use all the features.
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decent device
So far so good... is reliable and is simple and easy to use. Recommended
